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</head><body lang="EN-GB" link="blue" vlink="purple" style="word-wrap:break-word;overflow-wrap: break-word;-webkit-nbsp-mode: space;line-break:after-white-space">
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Sure!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">We only have 1.5 hours session in the IVOA interop meeting (probably short taking into account the complexity of the issue) and, also, this is a subject important for many of the ADASS participants
so good to have this BoF to have direct discussions.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Thanks for that!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Jesus<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><img width="600" height="30" style="width:6.25in;height:.3125in" id="Picture_x0020_3" src="cid:image001.jpg@01D9EFB0.D9FD77D0" alt="SKAO Horizontal Dividing Rule"><o:p></o:p></p>
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<p class="MsoNormal"><span lang="ES" style="color:#070068">Jesús Salgado</span><span lang="ES" style="font-size:9.0pt;font-family:"Verdana",sans-serif"> <br>
<span style="color:#E70068">SKA Regional Centre Architect</span></span><span lang="ES"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#5B6770"><a href="mailto:jesus.salgado@skao.int"><span lang="ES" style="color:#0563C1">jesus.salgado@skao.int</span></a></span><span lang="ES" style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#5B6770"><br>
</span><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#5B6770"><a href="https://www.skao.int/"><span lang="ES" style="color:#5B6770">www.skao.int</span></a></span><span lang="ES"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#5B6770">SKA Observatory<br>
Jodrell Bank, Lower Withington,<br>
Macclesfield, SK11 9FT, UK</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Giuliano Taffoni <giuliano.taffoni@inaf.it><br>
<b>Date: </b>Friday, 22 September 2023 at 16:32<br>
<b>To: </b>Jesus Salgado <jesus.salgado@skao.int><br>
<b>Cc: </b>"grid@ivoa.net" <grid@ivoa.net>, src-olive <src-olive@skao.int>, src-orange <src-orange@skao.int>, src-magenta <src-magenta@skao.int>, "Bertocco, Sara" <sara.bertocco@inaf.it>, Dave Morris <dave.morris@metagrid.co.uk><br>
<b>Subject: </b>Re: Minutes of 20/09/23 IVOA GWS Meeting - Science Platforms Federated Execution<o:p></o:p></span></p>
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<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks Jesus, Dave and Sara <o:p></o:p></p>
<div>
<p class="MsoNormal">I read the minutes, unfortunately I was not able to attend.<o:p></o:p></p>
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<div>
<p class="MsoNormal">I would like to mention that Claudio and I organised a BoF at ADASS on sciplatforms.<o:p></o:p></p>
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<p class="MsoNormal">It was accepted a couple of days ago.<o:p></o:p></p>
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<div>
<p class="MsoNormal">Maybe we could profit of the BoF (and eventually on one session on interop) to continue the discussion in person in particular for what regards the evolution of the executionplanner :-)<o:p></o:p></p>
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<p class="MsoNormal">Regards<o:p></o:p></p>
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<div>
<p class="MsoNormal">G.<o:p></o:p></p>
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<div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><br>
<br>
<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">On 21 Sep 2023, at 12:25, Salgado, Jesus <jesus.salgado@skao.int> wrote:<o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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<div>
<p class="MsoNormal">Dear all,<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<div>
<p class="MsoNormal">Thanks for the big attendance and the productive discussion during yesterday’s GWS meeting on Federated Execution across astronomical science platforms kick-off meeting.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Minutes of the meeting are at:<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://wiki.ivoa.net/twiki/bin/view/IVOA/GWSTelecon20230920"><span style="color:#0563C1">https://wiki.ivoa.net/twiki/bin/view/IVOA/GWSTelecon20230920</span></a><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<div>
<p class="MsoNormal">It was presented a summary of the issues to be address and Dave Morris presented the status of the Execution Planner, the first standard we want to promote within the team.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">As this was a kick-off session, we have identified some points that could be further discussed in the mailing list or during next interop session in Tucson.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
</div>
<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="mso-list:l4 level1 lfo1">Are we replicating work already solved by the Grid community?<o:p></o:p></li></ul>
<div>
<p class="MsoNormal">Our initial answer is that the grid (or later cloud communities) has some agreed standards that we need to study to introduce concepts but that are not usually software stack agnostics. In the same way we defined UWS (what is a job scheduler
when many job schedulers are present in many other contexts), the abstraction layer of the Execution Planner could be implemented with different software stacks below. In any case, of course we need to take attention to other standard ways to solve these problems.<o:p></o:p></p>
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<div>
<p class="MsoNormal"> <o:p></o:p></p>
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<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="mso-list:l1 level1 lfo2">Status of Execution Planner and missing points?<o:p></o:p></li></ul>
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<p class="MsoNormal">Note is quite complete. It must be addressed the data model to characterise capabilities of the platforms and characterisation of the workflows (in the general sense). This data model could be part of the Execution Planner standard (not
a separate document) and, also, it should address data location (this is an open issue)<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<li class="MsoNormal" style="mso-list:l0 level1 lfo3">Why not to create a layer on top of orchestrators? (Most of science platforms already have, e.g. a Kubernetes cluster)<o:p></o:p></li></ul>
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<p class="MsoNormal">Although it is true that some technologies are quite standard for most of the science platforms, technologies could change, and older platforms could have different set-ups. This is why IVOA protocols are usually software stack agnostics
so they could be implemented by all. In any case, it is important to know the level of heterogeneity of the different partners to identify if some things could be simplified assuming that compatible technologies.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<ul style="margin-top:0cm" type="disc">
<li class="MsoNormal" style="mso-list:l3 level1 lfo4">Could IVOA endorse or accept S3 as a data transfer protocol?<o:p></o:p></li></ul>
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<p class="MsoNormal">Not clear answer. Interesting to be discussed in the mailing list.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<li class="MsoNormal" style="mso-list:l2 level1 lfo5">Next steps?<o:p></o:p></li></ul>
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<p class="MsoNormal">The more important step is to identify who is willing to help on the prototyping as, in this particular case, the prototyping will clarify a lot about possible missing points on the execution planner definition.<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">Best Regards,<br>
Jesus Salgado, Sara Bertocco and Dave Morris<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span lang="ES" style="color:#070068">Jesús Salgado</span><span lang="ES" style="font-size:9.0pt;font-family:"Verdana",sans-serif"> <br>
<span style="color:#E70068">SKA Regional Centre Architect</span></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#5B6770"><a href="mailto:jesus.salgado@skao.int"><span lang="ES" style="color:#0563C1">jesus.salgado@skao.int</span></a></span><span lang="ES" style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#5B6770"><br>
</span><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#5B6770"><a href="https://www.skao.int/"><span lang="ES" style="color:#5B6770">www.skao.int</span></a></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Verdana",sans-serif;color:#5B6770">SKA Observatory<br>
Jodrell Bank, Lower Withington,<br>
Macclesfield, SK11 9FT, UK</span><o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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The SKA Observatory is an inter-governmental organisation and the successor of SKA Organisation, a private limited company by guarantee registered in England and Wales with registered number 07881918, with a registered office of Jodrell Bank, Lower Withington, Macclesfield, Cheshire, England, SK11 9FT.
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